<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS3平移动画</title>
    <style>
          * {
            margin: 0;
            padding: 0;
          }
        .box{
			width: 200px;
			height: 200px;
			border: 1px solid #000;
            border-radius:50%;
			margin: 150px auto;
            background-color: skyblue;

            animation: move 5s linear infinite;
            /* -webkit-animation: move 5s linear infinite; */
		}
        /* 平移动画 */
        @keyframes move {
            0% {
                transform:translate(0);
            }
            25% {
                transform:translateX(500px);
            }
            50% {
                transform:translateX(500px) translateY(500px);
            }
            75% {
                transform:translateX(0) translateY(500px);
            }
            100% {
                transform:translate(0);
            } 
        }
    </style>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>